Bosch MM588 Operating Instructions Manual page 46

The functions
Setting the handset
Ringing sound pattern
Press the programming button, followed by 1. The telephone
rings.
Select a melody by entering a digit (0-9), e.g. 3.
Confirm.
Menu Set telephone
Menu Key beep
Select the key beep, e.g. Click . You may choose between click,
tone and off.
Confirm.
Handset volume
Menu Set telephone
Menu Handset volume
Confirm.
Enter the handset volume (from 1 to 4), e.g. 3.
Confirm.
46
Integral 3
Continued